Predicting the canopy conductance to water vapor of grapevines using a biophysical model in a hot and arid climate

Canopy conductance is a crucial factor in modelling plant transpiration and is highly responsive to water stress. The objective of this study is to develop a straightforward method for estimating canopy conductance (g ) in grapevines. To predict g , this study combines stomatal conductance to water...

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Bibliographic Details
Published in:Frontiers in plant science 2024, Vol.15, p.1334215-1334215
Main Authors: Egipto, Ricardo Jorge Lopes, Aquino, Arturo, Andújar, José Manuel
Format: Article
Language:English
Subjects:
canopy conductance modeling
grapevine
sustainable irrigation
vineyard water management
water stress in grapevines
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Summary:Canopy conductance is a crucial factor in modelling plant transpiration and is highly responsive to water stress. The objective of this study is to develop a straightforward method for estimating canopy conductance (g ) in grapevines. To predict g , this study combines stomatal conductance to water vapor (g ) measurements from grapevine leaves, scaled to represent the canopy size by the leaf area index (LAI), with atmospheric variables, such as net solar radiation (R ) and air vapor pressure deficit (VPD). The developed model was then validated by comparing its predictions with g values calculated using the inverse of the Penman Monteith equation. The proposed model demonstrates its effectiveness in estimating the g , with the highest root-mean-squared-error (RMSE=1.45x10 ) being lower than the minimum g measured in the field (g =0.0005 ). The results of this study reveal the significant influence of both VPD and g on grapevine canopy conductance.
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2024.1334215